*,:before,:after{--tw-border-spacing-x: 0;--tw-border-spacing-y: 0;--tw-translate-x: 0;--tw-translate-y: 0;--tw-rotate: 0;--tw-skew-x: 0;--tw-skew-y: 0;--tw-scale-x: 1;--tw-scale-y: 1;--tw-pan-x: ;--tw-pan-y: ;--tw-pinch-zoom: ;--tw-scroll-snap-strictness: proximity;--tw-gradient-from-position: ;--tw-gradient-via-position: ;--tw-gradient-to-position: ;--tw-ordinal: ;--tw-slashed-zero: ;--tw-numeric-figure: ;--tw-numeric-spacing: ;--tw-numeric-fraction: ;--tw-ring-inset: ;--tw-ring-offset-width: 0px;--tw-ring-offset-color: #fff;--tw-ring-color: rgb(59 130 246 / .5);--tw-ring-offset-shadow: 0 0 #0000;--tw-ring-shadow: 0 0 #0000;--tw-shadow: 0 0 #0000;--tw-shadow-colored: 0 0 #0000;--tw-blur: ;--tw-brightness: ;--tw-contrast: ;--tw-grayscale: ;--tw-hue-rotate: ;--tw-invert: ;--tw-saturate: ;--tw-sepia: ;--tw-drop-shadow: ;--tw-backdrop-blur: ;--tw-backdrop-brightness: ;--tw-backdrop-contrast: ;--tw-backdrop-grayscale: ;--tw-backdrop-hue-rotate: ;--tw-backdrop-invert: ;--tw-backdrop-opacity: ;--tw-backdrop-saturate: ;--tw-backdrop-sepia: ;--tw-contain-size: ;--tw-contain-layout: ;--tw-contain-paint: ;--tw-contain-style: }::backdrop{--tw-border-spacing-x: 0;--tw-border-spacing-y: 0;--tw-translate-x: 0;--tw-translate-y: 0;--tw-rotate: 0;--tw-skew-x: 0;--tw-skew-y: 0;--tw-scale-x: 1;--tw-scale-y: 1;--tw-pan-x: ;--tw-pan-y: ;--tw-pinch-zoom: ;--tw-scroll-snap-strictness: proximity;--tw-gradient-from-position: ;--tw-gradient-via-position: ;--tw-gradient-to-position: ;--tw-ordinal: ;--tw-slashed-zero: ;--tw-numeric-figure: ;--tw-numeric-spacing: ;--tw-numeric-fraction: ;--tw-ring-inset: ;--tw-ring-offset-width: 0px;--tw-ring-offset-color: #fff;--tw-ring-color: rgb(59 130 246 / .5);--tw-ring-offset-shadow: 0 0 #0000;--tw-ring-shadow: 0 0 #0000;--tw-shadow: 0 0 #0000;--tw-shadow-colored: 0 0 #0000;--tw-blur: ;--tw-brightness: ;--tw-contrast: ;--tw-grayscale: ;--tw-hue-rotate: ;--tw-invert: ;--tw-saturate: ;--tw-sepia: ;--tw-drop-shadow: ;--tw-backdrop-blur: ;--tw-backdrop-brightness: ;--tw-backdrop-contrast: ;--tw-backdrop-grayscale: ;--tw-backdrop-hue-rotate: ;--tw-backdrop-invert: ;--tw-backdrop-opacity: ;--tw-backdrop-saturate: ;--tw-backdrop-sepia: ;--tw-contain-size: ;--tw-contain-layout: ;--tw-contain-paint: ;--tw-contain-style: }*,:before,:after{box-sizing:border-box;border-width:0;border-style:solid;border-color:#e5e7eb}:before,:after{--tw-content: ""}html,:host{line-height:1.5;-webkit-text-size-adjust:100%;-moz-tab-size:4;-o-tab-size:4;tab-size:4;font-family:ui-sans-serif,system-ui,sans-serif,"Apple Color Emoji","Segoe UI Emoji",Segoe UI Symbol,"Noto Color Emoji";font-feature-settings:normal;font-variation-settings:normal;-webkit-tap-highlight-color:transparent}body{margin:0;line-height:inherit}hr{height:0;color:inherit;border-top-width:1px}abbr:where([title]){-webkit-text-decoration:underline dotted;text-decoration:underline dotted}h1,h2,h3,h4,h5,h6{font-size:inherit;font-weight:inherit}a{color:inherit;text-decoration:inherit}b,strong{font-weight:bolder}code,kbd,samp,pre{font-family:ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,Liberation Mono,Courier New,monospace;font-feature-settings:normal;font-variation-settings:normal;font-size:1em}small{font-size:80%}sub,sup{font-size:75%;line-height:0;position:relative;vertical-align:baseline}sub{bottom:-.25em}sup{top:-.5em}table{text-indent:0;border-color:inherit;border-collapse:collapse}button,input,optgroup,select,textarea{font-family:inherit;font-feature-settings:inherit;font-variation-settings:inherit;font-size:100%;font-weight:inherit;line-height:inherit;letter-spacing:inherit;color:inherit;margin:0;padding:0}button,select{text-transform:none}button,input:where([type=button]),input:where([type=reset]),input:where([type=submit]){-webkit-appearance:button;background-color:transparent;background-image:none}:-moz-focusring{outline:auto}:-moz-ui-invalid{box-shadow:none}progress{vertical-align:baseline}::-webkit-inner-spin-button,::-webkit-outer-spin-button{height:auto}[type=search]{-webkit-appearance:textfield;outline-offset:-2px}::-webkit-search-decoration{-webkit-appearance:none}::-webkit-file-upload-button{-webkit-appearance:button;font:inherit}summary{display:list-item}blockquote,dl,dd,h1,h2,h3,h4,h5,h6,hr,figure,p,pre{margin:0}fieldset{margin:0;padding:0}legend{padding:0}ol,ul,menu{list-style:none;margin:0;padding:0}dialog{padding:0}textarea{resize:vertical}input::-moz-placeholder,textarea::-moz-placeholder{opacity:1;color:#9ca3af}input::placeholder,textarea::placeholder{opacity:1;color:#9ca3af}button,[role=button]{cursor:pointer}:disabled{cursor:default}img,svg,video,canvas,audio,iframe,embed,object{display:block;vertical-align:middle}img,video{max-width:100%;height:auto}[hidden]:where(:not([hidden=until-found])){display:none}.container{width:100%}@media(min-width:640px){.container{max-width:640px}}@media(min-width:768px){.container{max-width:768px}}@media(min-width:1024px){.container{max-width:1024px}}@media(min-width:1280px){.container{max-width:1280px}}@media(min-width:1536px){.container{max-width:1536px}}.block{display:block}.flex{display:flex}.filter{filter:var(--tw-blur) var(--tw-brightness) var(--tw-contrast) var(--tw-grayscale) var(--tw-hue-rotate) var(--tw-invert) var(--tw-saturate) var(--tw-sepia) var(--tw-drop-shadow)}:root{--primary-color: #0046dc;--primary-light: #1a5ae6;--primary-dark: #0038b3;--accent-color: #e53935;--accent-light: #ff6f60;--background: #f5f7fa;--surface: #ffffff;--text-primary: #1a1a2e;--text-secondary: #6b7280;--text-muted: #9ca3af;--border-color: #e5e7eb;--shadow-sm: 0 1px 2px rgba(0, 0, 0, .05);--shadow-md: 0 4px 6px -1px rgba(0, 0, 0, .1);--shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, .1)}*{margin:0;padding:0;box-sizing:border-box;-webkit-tap-highlight-color:transparent}html,body{height:100%;overflow:hidden;font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background-color:var(--background);color:var(--text-primary);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}body{position:fixed;inset:0}#app{height:100%;width:100%}.app-container{display:flex;flex-direction:column;height:100%;width:100%;max-width:100%;background-color:var(--background)}.header{flex-shrink:0;background:linear-gradient(135deg,var(--primary-color) 0%,var(--primary-light) 100%);color:#fff;padding:12px 16px;box-shadow:var(--shadow-md);z-index:100}.header-content{display:flex;align-items:center;justify-content:space-between;max-width:600px;margin:0 auto}.logo-section{display:flex;align-items:center;gap:10px}.logo-icon{width:36px;height:36px;display:flex;align-items:center;justify-content:center;color:#fff}.brand-text{display:flex;flex-direction:column}.brand-name{font-size:18px;font-weight:700;letter-spacing:.5px}.brand-subtitle{font-size:11px;opacity:.85;letter-spacing:.3px}.header-actions{display:flex;gap:8px}.header-btn{width:36px;height:36px;border:none;background:#ffffff26;border-radius:10px;color:#fff;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all .2s ease}.header-btn:hover{background:#ffffff40}.header-btn:active{transform:scale(.95)}.welcome-message{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:32px 24px;text-align:center;animation:fadeIn .5s ease}@keyframes fadeIn{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}.welcome-icon{width:80px;height:80px;background:linear-gradient(135deg,var(--primary-color) 0%,var(--primary-light) 100%);border-radius:20px;display:flex;align-items:center;justify-content:center;color:#fff;margin-bottom:20px;box-shadow:var(--shadow-lg)}.welcome-message h2{font-size:22px;font-weight:600;color:var(--text-primary);margin-bottom:8px}.welcome-message p{font-size:14px;color:var(--text-secondary);max-width:280px;line-height:1.5}.quick-questions{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px;justify-content:center}.quick-question{padding:10px 18px;background:var(--surface);border:1.5px solid var(--primary-color);border-radius:20px;color:var(--primary-color);font-size:13px;font-weight:500;cursor:pointer;transition:all .2s ease}.quick-question:hover{background:var(--primary-color);color:#fff}.quick-question:active{transform:scale(.96)}.message-list{flex:1;overflow-y:auto;padding:16px 16px 8px;scroll-behavior:smooth;-webkit-overflow-scrolling:touch}.message-list::-webkit-scrollbar{width:4px}.message-list::-webkit-scrollbar-track{background:transparent}.message-list::-webkit-scrollbar-thumb{background:var(--text-muted);border-radius:2px}.message-list::-webkit-scrollbar-thumb:hover{background:var(--text-secondary)}.message{display:flex;gap:10px;margin-bottom:16px;animation:slideIn .3s ease}@keyframes slideIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.user-message{flex-direction:row-reverse}.assistant-message{flex-direction:row}.avatar{width:36px;height:36px;border-radius:50%;display:flex;align-items:center;justify-content:center;flex-shrink:0}.assistant-avatar{background:linear-gradient(135deg,var(--primary-color) 0%,var(--primary-light) 100%);color:#fff}.user-avatar{background:linear-gradient(135deg,var(--accent-color) 0%,var(--accent-light) 100%);color:#fff}.message-bubble{max-width:75%;padding:12px 16px;border-radius:18px;position:relative}.user-message .message-bubble{background:linear-gradient(135deg,var(--primary-color) 0%,var(--primary-light) 100%);color:#fff;border-bottom-right-radius:4px}.assistant-message .message-bubble{background:var(--surface);color:var(--text-primary);border-bottom-left-radius:4px;box-shadow:var(--shadow-sm)}.message-content{font-size:15px;line-height:1.5;word-wrap:break-word;white-space:pre-wrap}.message-content.error{color:var(--accent-color)}.option-buttons{display:flex;flex-wrap:wrap;gap:8px;margin-top:10px}.option-btn{padding:8px 16px;background:linear-gradient(135deg,#0046dc14,#1a5ae61f);border:1.5px solid rgba(0,70,220,.3);border-radius:18px;color:var(--primary-color);font-size:13px;font-weight:500;cursor:pointer;transition:all .25s ease;line-height:1.4;text-align:left;font-family:inherit}.option-btn:hover:not(.disabled){background:linear-gradient(135deg,var(--primary-color) 0%,var(--primary-light) 100%);color:#fff;border-color:transparent;transform:translateY(-1px);box-shadow:var(--shadow-md)}.option-btn:active:not(.disabled){transform:scale(.96) translateY(0)}.option-btn.disabled{opacity:.5;cursor:not-allowed}.message-time{font-size:10px;margin-top:4px;opacity:.6;text-align:right}.user-message .message-time{color:#fffc}.assistant-message .message-time{color:var(--text-muted)}.thinking-indicator{display:flex;align-items:center;gap:8px;margin-bottom:8px;padding:8px 12px;background:#1e3a5f14;border-radius:12px}.thinking-dots{display:flex;gap:4px}.thinking-dots span{width:6px;height:6px;background:var(--primary-color);border-radius:50%;animation:bounce 1.4s infinite ease-in-out both}.thinking-dots span:nth-child(1){animation-delay:-.32s}.thinking-dots span:nth-child(2){animation-delay:-.16s}@keyframes bounce{0%,80%,to{transform:scale(0)}40%{transform:scale(1)}}.thinking-text{font-size:12px;color:var(--text-secondary);flex:1;overflow:hidden;text-overflow:ellipsis;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical}.thinking-section{margin-bottom:8px;padding:6px 10px;background:#1e3a5f0f;border-radius:8px;font-size:12px}.thinking-header{display:flex;align-items:center;gap:6px;cursor:pointer;color:var(--primary-color);font-weight:500;-webkit-user-select:none;-moz-user-select:none;user-select:none}.thinking-header:hover{opacity:.8}.thinking-icon{flex-shrink:0}.chevron{margin-left:auto;transition:transform .2s ease}.thinking-section.collapsed .chevron,.thinking-header:not(.expanded) .chevron{transform:rotate(-90deg)}.thinking-content{margin-top:8px;padding:8px;background:#1e3a5f0a;border-radius:6px;color:var(--text-secondary);line-height:1.5;white-space:pre-wrap;word-break:break-word}.input-area{flex-shrink:0;background:var(--surface);padding:12px 16px;padding-bottom:calc(12px + env(safe-area-inset-bottom,0px));border-top:1px solid var(--border-color);box-shadow:0 -2px 10px #0000000d}.input-container{display:flex;align-items:flex-end;gap:10px;max-width:600px;margin:0 auto}.message-input{flex:1;min-height:44px;max-height:120px;padding:10px 16px;border:1.5px solid var(--border-color);border-radius:22px;font-size:15px;font-family:inherit;resize:none;outline:none;transition:all .2s ease;background:var(--background);line-height:1.4}.message-input:focus{border-color:var(--primary-color);background:var(--surface)}.message-input::-moz-placeholder{color:var(--text-muted)}.message-input::placeholder{color:var(--text-muted)}.send-btn{width:44px;height:44px;border:none;border-radius:50%;background:linear-gradient(135deg,var(--primary-color) 0%,var(--primary-light) 100%);color:#fff;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all .2s ease;flex-shrink:0}.send-btn:disabled{background:var(--text-muted);cursor:not-allowed;opacity:.6}.send-btn:not(:disabled):hover{transform:scale(1.05);box-shadow:var(--shadow-md)}.send-btn:not(:disabled):active{transform:scale(.95)}.input-hint{max-width:600px;margin:6px auto 0;text-align:center}.input-hint span{font-size:11px;color:var(--text-muted)}.help-dialog-overlay{position:fixed;inset:0;background:#00000080;display:flex;align-items:center;justify-content:center;z-index:1000;padding:20px;animation:fadeIn .2s ease}.help-dialog{width:100%;max-width:400px;max-height:80vh;background:var(--surface);border-radius:20px;overflow:hidden;animation:slideUp .3s ease}@keyframes slideUp{0%{opacity:0;transform:translateY(30px)}to{opacity:1;transform:translateY(0)}}.help-header{display:flex;align-items:center;justify-content:space-between;padding:16px 20px;background:linear-gradient(135deg,var(--primary-color) 0%,var(--primary-light) 100%);color:#fff}.help-header h3{font-size:17px;font-weight:600}.close-btn{width:32px;height:32px;border:none;background:#fff3;border-radius:50%;color:#fff;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all .2s ease}.close-btn:hover{background:#ffffff4d}.help-content{padding:20px;overflow-y:auto;max-height:calc(80vh - 60px)}.help-item{margin-bottom:20px}.help-item:last-child{margin-bottom:0}.help-item h4{font-size:15px;font-weight:600;color:var(--text-primary);margin-bottom:6px}.help-item p{font-size:13px;color:var(--text-secondary);line-height:1.5}@media(max-width:480px){.header{padding:10px 14px}.logo-icon{width:32px;height:32px}.brand-name{font-size:16px}.brand-subtitle{font-size:10px}.welcome-message{padding:24px 20px}.welcome-icon{width:64px;height:64px;border-radius:16px;margin-bottom:16px}.welcome-icon svg{width:36px;height:36px}.welcome-message h2{font-size:20px}.welcome-message p{font-size:13px}.quick-question{padding:8px 14px;font-size:12px}.message-list{padding:12px}.message-bubble{max-width:82%;padding:10px 14px}.message-content{font-size:14px}.avatar{width:32px;height:32px}.input-area{padding:10px 14px}.message-input{padding:8px 14px;font-size:14px}.send-btn{width:40px;height:40px}}@supports (padding-bottom: env(safe-area-inset-bottom)){.input-area{padding-bottom:calc(12px + env(safe-area-inset-bottom))}}@media(prefers-color-scheme:dark){:root{--background: #0f172a;--surface: #1e293b;--text-primary: #f1f5f9;--text-secondary: #94a3b8;--text-muted: #64748b;--border-color: #334155}}.app-container{display:flex;height:100%;width:100%}.main-content{flex:1;display:flex;flex-direction:column;height:100%;overflow:hidden}.sidebar{position:fixed;left:0;top:0;bottom:0;width:280px;background:var(--surface);border-right:1px solid var(--border-color);display:flex;flex-direction:column;z-index:200;transform:translate(-100%);transition:transform .3s ease}.sidebar.open{transform:translate(0)}.sidebar-overlay{display:none;position:fixed;inset:0;background:#00000080;z-index:150;opacity:0;transition:opacity .3s ease}.sidebar-overlay.show{display:block;opacity:1}.sidebar-header{padding:16px;border-bottom:1px solid var(--border-color)}.new-chat-btn{width:100%;display:flex;align-items:center;justify-content:center;gap:8px;padding:12px 16px;background:linear-gradient(135deg,var(--primary-color) 0%,var(--primary-light) 100%);color:#fff;border:none;border-radius:12px;font-size:14px;font-weight:500;cursor:pointer;transition:all .2s ease}.new-chat-btn:hover{transform:translateY(-1px);box-shadow:var(--shadow-md)}.new-chat-btn:active{transform:translateY(0)}.clear-all-btn{display:flex;align-items:center;justify-content:center;width:36px;height:36px;background:#fef2f2;color:#dc2626;border:1px solid #fecaca;border-radius:8px;cursor:pointer;transition:all .2s ease;flex-shrink:0}.clear-all-btn:hover{background:#fee2e2;border-color:#fca5a5}.clear-all-btn:active{transform:scale(.95)}.sidebar-header{display:flex;gap:8px;padding:16px;border-bottom:1px solid var(--border-color)}.sidebar-header .new-chat-btn{flex:1}.sidebar-content{flex:1;overflow-y:auto;padding:8px}.conversation-list{display:flex;flex-direction:column;gap:4px}.empty-conversations{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:40px 20px;color:var(--text-muted);text-align:center}.empty-conversations svg{margin-bottom:12px;opacity:.5}.empty-conversations p{font-size:13px}.conversation-item{display:flex;align-items:center;padding:12px;border-radius:10px;cursor:pointer;transition:all .2s ease;gap:8px}.conversation-item:hover{background:var(--background)}.conversation-item.active{background:linear-gradient(135deg,#0046dc1a,#0046dc0d);border-left:3px solid var(--primary-color)}.conversation-info{flex:1;min-width:0}.conversation-title{font-size:14px;font-weight:500;color:var(--text-primary);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.conversation-time{font-size:11px;color:var(--text-muted);margin-top:2px}.conversation-delete{width:28px;height:28px;border:none;background:transparent;border-radius:6px;color:var(--text-muted);cursor:pointer;display:flex;align-items:center;justify-content:center;opacity:0;transition:all .2s ease}.conversation-item:hover .conversation-delete{opacity:1}.conversation-delete:hover{background:#e539351a;color:var(--accent-color)}.sidebar-footer{padding:12px 16px;border-top:1px solid var(--border-color);text-align:center}.sidebar-footer-info{font-size:12px;color:var(--text-muted)}.header-left,.header-right{display:flex;align-items:center;gap:8px}.header-center{flex:1;display:flex;justify-content:center}.menu-btn{width:40px;height:40px;border:none;background:transparent;border-radius:10px;color:#fff;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all .2s ease}.menu-btn:hover{background:#ffffff26}@media(max-width:768px){.sidebar{width:85%;max-width:300px}}
